水下焊接参数相关性分析及其电弧稳定性研究

发布时间：2018-03-14 18:23

本文选题：水下焊接　切入点：水深　出处：《上海交通大学学报》2015年01期 　论文类型：期刊论文

【摘要】：在高压舱内进行了不同水深的水下湿法药芯焊丝焊接(FCAW)试验,以电弧电压差异系数的倒数作为衡量电弧稳定性的指标,分析了不同水深条件下电弧电压与焊接电流之间的相关性对电弧稳定性的影响,并从送丝-熔化系统的角度探讨了电压与电流的相关性对电弧稳定性的影响规律;利用二次函数拟合电弧稳定性指标与电弧电压之间的关系,得到最佳的电压与电流关系.结果表明:最佳的水下湿法FCAW的电压与电流关系曲线呈上升的变化特性,随着水深增加,FCAW需要更高的电弧电压;水下湿法FCAW的电弧稳定性取决于电压与电流的相关性,而并非简单地随着水深的增加而下降;水深对电弧稳定性的影响主要表现在电压与电流相关性的不同;随着水深增加,相同焊接电流所需的电弧电压相应地增大.
[Abstract]:The FCAW test of underwater wet flux-cored wire welding with different water depths was carried out in the high pressure chamber. The reciprocal of arc voltage difference coefficient was taken as the index to evaluate the arc stability. The influence of the correlation between arc voltage and welding current on arc stability under different water depth is analyzed, and the effect of voltage and current on arc stability is discussed from the point of view of wire feeding and melting system. The relationship between arc stability index and arc voltage is fitted by quadratic function, and the optimum relationship between voltage and current is obtained. The results show that the curve of the relationship between voltage and current of the best underwater wet FCAW is rising. The arc stability of underwater wet FCAW depends on the correlation between voltage and current, but does not simply decrease with the increase of water depth. The effect of water depth on arc stability is mainly due to the difference between voltage and current, and the arc voltage required for the same welding current increases with the increase of water depth.
【作者单位】：华南理工大学机械与汽车工程学院;
【基金】：国家自然科学基金资助项目(51175185,51374111)
【分类号】：TG456.5

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